The facilities and ships under construction at the US naval shipyard at Mare Island according to a memorandum dated 30 July 1937

President Roosevelt asked on 17 July the Navy Department what extra building ways and shop facilities were needed at the navy yards to built each a merchant ship (hospital ship, passenger ship or transport) of 10.000-15.000-20.00 tons. In a memorandum dated 30 July 1937 he got his wanted details. While all naval facilities were in use or obligated by June 1939 there were 6 new building ways needed if 6 merchant ships were to be built. The given costs were if a 20.000 tons ship was to be built, for the 10.000 and 15.000 tons was the building way 400.000 US dollars cheaper except for the yard at New Orleans.

Costs for the naval shipyard at Mare Island for 1 complete building way complete with cranes 1.500.000 US dollars, plant improvements 850.000 US dollars and machine tools 300.000 US dollars, totally 2.650.000 US dollars. The 300.000 US dollars for tools included 200.000 machine shop tools and 100.000 welding equipment and platforms. The 850.000 US dollars for plant included 300.000 improvements to distributing systems, 200.000 wide gauge drydock crane, 100.000 welding equipment and platforms and 250.000 extension of berthing.  

Th yard was suitable for building submarines, cruisers and destroyers. There were 2 building ways: No. 1 dimensions around 600 x 105 feet for cruisers and No. 2 dimensions around 500 x 70 feet for destroyers.  

 Under construction on that moment were:

Submarine Pompano (SS181), afloat and nearing completion.(1)

Destroyer Henley (DD391), afloat and nearing completion.(2)

Submarine Sturgeon (SS187) about 50% complete.(3)

Submarine Swordfish (SS193), no laid down, probably January 1938.(4)

Notes

1. Of the Porpoise-class, preceded by Cachalot-class, succeeded by Salmon-class, laid down on 14 January 1936, launched on 11 March 1937, commissioned on 12 July 1937 and lost between 17-27 September 1934 off the Japanese coast.  

2. Of the Bagley-class, preceded by Gridley-class, succeeded by Somers-class, laid down on 28 October 1935, launched on 12 January 1937, commissioned on 14 August 1937 and torpedoed and sunk by Japanese submarine Ro-108 off Finschafen, [Papua] New Guinea on 3 October 1943.  

3. Of the Salmon-class, preceded by Porpoise-class, succeeded by Sargo-class, laid down on 27 October 1936, launched on 15 March 1938, commissioned on 25 June 1938, decommissioned on 15 November 1945, stricken on 30 April 1948 and sold to b  broken up on 12 June 1948.  

4. Of the Sargo-class, preceded by Salmon-class, succeeded by Tambor-class. laid down on 27 October 1937, launched on 1 April 1939, commissioned on 22 July 1939, probably sunk by the Japanese in the Ryukyu Islands on 12 January 1945 and stricken on 19 May 1945.  

Source

Franklin Roosevelt D. Roosevelt Presidential Library&Museum. Map Navy Department October 1936-1937 FDR’s President’s Secretary’s File (psfc000057)